Random number generate - Specific values

Question

Guilherme Lopes de Campos 2023-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/2023152-random-number-generate-specific-values

评论： Guilherme Lopes de Campos 2023-9-19

Dear community,

I would like to generate 5000 random values, on the follow form:

At the original dataset, there are four values: {7,8.5,9.625,12.25}. Thus, I need a dataset with 5000 values with fours values shown before, in random distribuited.

Can help me, please?

Thank you very much,

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Answer 1

dpb 2023-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/2023152-random-number-generate-specific-values#answer_1313442

在 MATLAB Online 中打开

V=[7,8.5,9.625,12.25];          % the values to repeat
N=5000;                         % total number wanted
RV=repmat(V,1,N/numel(V));      % initial vector of N values of V
RV=RV(randperm(N));             % randomize the order
RV(1:10)                        % show off first several...
ans = 1×10
    9.6250    7.0000    9.6250    8.5000    8.5000    8.5000    7.0000    9.6250    9.6250    7.0000

I'm taking a guess that is the Q? asked -- to create a randomized ordering of length 5000 of the specific values given. If that wasn't the intent, please clarify what was requested result to be...

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Answer 2

William Rose 2023-9-19

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https://ww2.mathworks.cn/matlabcentral/answers/2023152-random-number-generate-specific-values#answer_1313437

在 MATLAB Online 中打开

@Guilherme Lopes de Campos,

x=[7,8.5,9.625,12.25];
z=x(randi(4,1,7))   % 7 randomly selected from x
z = 1×7
    9.6250    9.6250    9.6250    8.5000    9.6250    7.0000   12.2500
z=x(randi(4,1,5000)); % 5000 randomly selected from x